Innovene S HDPE装置V4003结块分析
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摘要
Innovene S高密度聚乙烯装置从PE100级管材专用树脂的生产周期停车时,在残留粉料的排空过程中,低压闪蒸罐内会逐渐出现较大结块,采用~(13)C NMR,GPC,SEM,DSC,TREF等方法对结块进行了表征。实验结果表明,结块的主要组分为低相对分子质量聚乙烯,次要组分为粉料粒子,且两组分完全由第1反应器生成。其中,低相对分子质量聚乙烯能够溶于反应溶剂,它在溶剂中的浓度是影响结块形成的关键。在正常生产中,部分低相对分子质量聚乙烯可参与初生态共聚物的原位结晶,导致它的含量降低,从而避免结块的形成。
When Innovene S HDPE plant shutdown from the production cycle of PE100 pipe material,big agglomeration will gradually appear in the low-pressure ?ash tank during the emptying process of residual powder. ~(13)C NMR,GPC,SEM,DSC and TREF were used to characterize the agglomeration. The results showed that the main component of the agglomeration was low molecular weight polyethylene,and the secondary component was powder particles. Furthermore,the two components were completely generated by the ?rst reactor. The low molecular weight polyethylene was soluble in the reaction solvent of the plant,and its concentration in the solvent was the key to in?uence the agglomeration formation. In normal production,part of low molecular weight polyethylene could participate in in-situ crystallization of the nascent copolymer,resulting in a decrease in its content,thus avoiding the formation of agglomeration.
When Innovene S HDPE plant shutdown from the production cycle of PE100 pipe material,big agglomeration will gradually appear in the low-pressure ?ash tank during the emptying process of residual powder. ~(13)C NMR,GPC,SEM,DSC and TREF were used to characterize the agglomeration. The results showed that the main component of the agglomeration was low molecular weight polyethylene,and the secondary component was powder particles. Furthermore,the two components were completely generated by the ?rst reactor. The low molecular weight polyethylene was soluble in the reaction solvent of the plant,and its concentration in the solvent was the key to in?uence the agglomeration formation. In normal production,part of low molecular weight polyethylene could participate in in-situ crystallization of the nascent copolymer,resulting in a decrease in its content,thus avoiding the formation of agglomeration.
引文
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[10]宋珍珍.高密度聚乙烯装置旋液分离器堵塞原因及对策分析[J].广东化工,2014,41(13):223-224.
[2]裴小静,孙丛丛,孙丽丽.高密度聚乙烯淤浆聚合工艺及其国内应用进展[J].齐鲁石油化工,2015(2):166-170.
[3]李连野.高密度聚乙烯生产现状的研究[J].科技展望,2015(20):89.
[4]苟清强,刘志伟,朱孝恒,等. BCL-100催化剂在Innovene S工艺生产PE100管材专用料中的工业试验[J].石油化工,2015,44(9):1106-1109.
[5]张庶,朱孝恒,王少会,等. BCL-100型催化剂在Innovene S工艺装置上实现长周期生产[J].合成树脂及塑料,2015,32(5):41-45.
[6]朱孝恒,郭子芳,苟清强,等.BCL-100催化剂制备的PE100管材性能[J].石油化工,2015,44(9):1110-1114.
[7]刘浪,高胜利,刘升.淤浆法高密度聚乙烯钛系转产铬系工艺优化[J].生物化工,2018,4(1):47-49.
[8]黄红红,魏东,郭梅芳.结晶分级和分析型升温淋洗分级表征聚烯烃[J].石油化工,2010,39(10):1166-1170.
[9]曲振辉.高密度聚乙烯淤浆处理系统堵塞原因的分析[J].石油化工,2016,45(9):1123-1127.
[10]宋珍珍.高密度聚乙烯装置旋液分离器堵塞原因及对策分析[J].广东化工,2014,41(13):223-224.